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Product Detailed Parameters
- Description：IC VREF SHUNT ADJ 2.2% 8SOIC
- Series：-
- Mfr：onsemi
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Type：Adjustable
- Voltage - Output (Min/Fixed)：2.495V
- Voltage - Output (Max)：36 V
- Current - Output：100 mA
- Operating Temperature：0°C ~ 70°C (TA)
- Mounting Type：Surface Mount
- Package / Case：8-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：8-SOIC
- Grade：-
- Qualification：-
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Overview
The onsemi TL431CDR2 is a three-terminal programmable shunt regulator diode in an SOIC-8 package. It operates as a low temperature coefficient zener, programmable from Vref to 36 V using two external resistors. The device features a cathode current range of 1.0 mA to 100 mA and a typical dynamic impedance of 0.22 Ω. It has a reference voltage tolerance of ±2.2% at 25°C and a typical full-range temperature coefficient of 50 ppm/°C. The maximum cathode-to-anode voltage is 37 V, with an operating ambient temperature range of 0°C to +70°C.
Feature Summary
- Programmable output voltage capability up to 36 V
- Low dynamic output impedance for stable regulation
- Temperature compensated operation over the rated range
Applications
- Digital voltmeters
- Power supplies
- Op amp circuitry
- Constant current sources
Procurement Notes
Verify the specific suffix 'D' corresponds to the SOIC-8 package and 'C' indicates the ±2.2% tolerance grade. Confirm the absence of the 'G' suffix if lead-free status is not required by the design specification. Ensure the operating temperature range aligns with the 0°C to +70°C rating for the CD variant rather than industrial or automotive grades.
Selection Notes
Select this component when a precise, adjustable reference voltage is needed within the 2.5 V to 36 V range. The ±2.2% tolerance suits applications where tighter precision is not critical. Consider the thermal resistance characteristics for power dissipation limits in the SOIC-8 package. Verify stability requirements regarding load capacitance against the provided boundary curves.
Part Context
This part belongs to the TL431 series of programmable precision references manufactured by onsemi. It serves as a monolithic IC replacement for traditional Zener diodes in various analog and digital circuits. The series includes variants with different tolerances (A, B, C) and temperature ranges (I, C, BV).
Replacement Considerations
Compatible substitutes include TL431ACDR2G and TL431BCDR2G from onsemi, which offer tighter tolerances. Other manufacturers' equivalents such as LM431 or KA431 may function similarly but require verification of pinout and electrical parameters.
